RRB RPF RPSF SI and CONS Model Papers 9 with solutions

Question : 56 of 120

Marks: +1, -0

The LCM and the HCF of the numbers 28 and 42 are in the ratio :

Solution:

(1) L.C.M. of 28 and 42

= 2 × 2 × 7 × 3 = 84
H.C. F. of 28 and 42

28) 42 (1

\;\;\;\;\;\;

\;\;\;\;\;\;

14 ) 28 ( 2

\;\;\;\;\;\;\;\;\;\;\;\;\;

\;\;\;\;\;\;\;\;\;\;\;\;\;

∴ H.C. F = 14
Required ratio

= {84}/{14}=6 : 1

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